Subject: [PATCH net-next 02/16] i40e: Don't receive packets when the napi budget == 0

From: [email-masked] (Eric W. Biederman)
Date: Fri, 14 Mar 2014 17:59:10 -0700

Processing any incoming packets with a with a napi budget of 0
is incorrect driver behavior.

This matters as netpoll will shortly call drivers with a budget of 0
to avoid receive packet processing happening in hard irq context.

Signed-off-by: "Eric W. Biederman" <[email-masked]>
---
 drivers/net/ethernet/intel/i40e/i40e_txrx.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 2081bdb214e5..2c21dd5ddcb6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1264,6 +1264,9 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
 	u8 rx_ptype;
 	u64 qword;
 
+	if (budget <= 0)
+		return 0;
+
 	rx_desc = I40E_RX_DESC(rx_ring, i);
 	qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len);
 	rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >>
-- 
1.7.5.4